I want to note that your laptop barely meets the recommended requirements, which means you will need to run it between low and medium settings. As it is leaning towards the minimum requirements.

What happens when you force GTA V to use Direct X 10 API?

Also it looks like you have two driver versions for each card. Download the latest AMD driver if you haven't already and try and update the driver in the following manner.

Make sure both cards are active, and then run the driver installation.

If that doesn't update the drivers try the following.

Go to Device Manager and disable one of the video cards the "AMD Radeon HD 8600/8700M" which I assume is the secondary card and the one with the newer driver, and then update the other driver to match the "AMD Radeon HD 8600/8700M" driver version.

Are the two cards using the same driver or is the driver version still different?

Did you try this?

Make sure both cards are active, and then run the driver installation.

If that doesn't update the drivers try the following.

Go to Device Manager and disable one of the video cards the "AMD Radeon HD 8600/8700M" which I assume is the secondary card and the one with the newer driver, and then update the other driver to match the "AMD Radeon HD 8600/8700M" driver version.